CN103114244A - Martensite stainless steel smelting process - Google Patents
Martensite stainless steel smelting process Download PDFInfo
- Publication number
- CN103114244A CN103114244A CN2012105186949A CN201210518694A CN103114244A CN 103114244 A CN103114244 A CN 103114244A CN 2012105186949 A CN2012105186949 A CN 2012105186949A CN 201210518694 A CN201210518694 A CN 201210518694A CN 103114244 A CN103114244 A CN 103114244A
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- Prior art keywords
- refining
- eaf
- ladle
- percent
- stainless steel
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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- 238000000034 method Methods 0.000 title claims abstract description 28
- 238000003723 Smelting Methods 0.000 title claims abstract description 12
- 229910000734 martensite Inorganic materials 0.000 title claims abstract description 10
- 229910001220 stainless steel Inorganic materials 0.000 title claims abstract description 10
- 239000010935 stainless steel Substances 0.000 title claims abstract description 10
- 238000007670 refining Methods 0.000 claims abstract description 32
- 229910052757 nitrogen Inorganic materials 0.000 claims abstract description 16
- 229910052799 carbon Inorganic materials 0.000 claims abstract description 15
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 12
- 239000010959 steel Substances 0.000 claims abstract description 12
- CXOWYMLTGOFURZ-UHFFFAOYSA-N azanylidynechromium Chemical compound [Cr]#N CXOWYMLTGOFURZ-UHFFFAOYSA-N 0.000 claims abstract description 10
- 229910052698 phosphorus Inorganic materials 0.000 claims abstract description 10
- 239000011651 chromium Substances 0.000 claims abstract description 8
- 238000007254 oxidation reaction Methods 0.000 claims abstract description 8
- 230000003647 oxidation Effects 0.000 claims abstract description 7
- 229910052804 chromium Inorganic materials 0.000 claims abstract description 5
- 230000003628 erosive effect Effects 0.000 claims abstract description 4
- 239000002994 raw material Substances 0.000 claims abstract description 4
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims description 24
- 239000002893 slag Substances 0.000 claims description 15
- 229910045601 alloy Inorganic materials 0.000 claims description 12
- 239000000956 alloy Substances 0.000 claims description 12
- 238000010079 rubber tapping Methods 0.000 claims description 12
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 claims description 6
- 238000007664 blowing Methods 0.000 claims description 6
- 238000010891 electric arc Methods 0.000 claims description 6
- 238000005516 engineering process Methods 0.000 claims description 6
- 238000011084 recovery Methods 0.000 claims description 6
- 238000003756 stirring Methods 0.000 claims description 6
- 239000000203 mixture Substances 0.000 claims description 4
- 229910001339 C alloy Inorganic materials 0.000 claims description 3
- 241001417490 Sillaginidae Species 0.000 claims description 3
- 229910052786 argon Inorganic materials 0.000 claims description 3
- 230000009286 beneficial effect Effects 0.000 claims description 3
- 239000011449 brick Substances 0.000 claims description 3
- 239000000470 constituent Substances 0.000 claims description 3
- 239000012467 final product Substances 0.000 claims description 3
- 239000007789 gas Substances 0.000 claims description 3
- 239000000155 melt Substances 0.000 claims description 3
- 239000000047 product Substances 0.000 claims description 3
- 238000005070 sampling Methods 0.000 claims description 3
- 238000002791 soaking Methods 0.000 claims description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 3
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 abstract description 5
- 238000011946 reduction process Methods 0.000 abstract description 2
- 238000009847 ladle furnace Methods 0.000 abstract 2
- VVTSZOCINPYFDP-UHFFFAOYSA-N [O].[Ar] Chemical compound [O].[Ar] VVTSZOCINPYFDP-UHFFFAOYSA-N 0.000 abstract 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 abstract 1
- 238000005261 decarburization Methods 0.000 abstract 1
- 238000007599 discharging Methods 0.000 abstract 1
- 229910052760 oxygen Inorganic materials 0.000 abstract 1
- 239000001301 oxygen Substances 0.000 abstract 1
- 150000001875 compounds Chemical class 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- QJGQUHMNIGDVPM-UHFFFAOYSA-N nitrogen group Chemical group [N] QJGQUHMNIGDVPM-UHFFFAOYSA-N 0.000 description 1
- 238000003672 processing method Methods 0.000 description 1
Classifications
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P10/00—Technologies related to metal processing
- Y02P10/20—Recycling
Landscapes
- Treatment Of Steel In Its Molten State (AREA)
Abstract
The invention discloses a martensite stainless steel smelting process which is characterized in that the process adopts non-VOD (vacuum oxygen decarbufization) smelting, secondary reduction processes of unstable oxides in and after the VOD or AOD (argon oxygen decarburization) process are reduced, and the oxidation products are removed through continuous slagging, so that the steel ladle is positioned in a high-temperature state for a long time, and erosion loss of the steel ladle is accelerated; the contents of C and P in final components are reduced; the martensite stainless steel comprises the following raw material components in percentage by weight: 0.09-0.12 percent of C, 8-9.5 percent of Cr, 0.85-1.05 percent of Mo, 0.030-0.060 percent of N, less than or equal to 0.02 percent of P and the balance of Fe; and the smelting process comprises the following steps of: A, performing EAF (electric arch furnace) crude refining; B, performing LF (ladle furnace) refining, C, performing VD refining, D, adding chromium nitride and E, discharging to obtain the martensite stainless steel product. According to the process, the smelting time is shortened, the contents of C and P are guaranteed, and the re-oxidation of Cr and carbon is avoided.
Description
Technical field
The invention belongs to technical field of smelting.
Background technology
P91 is a kind of martensite type stainless steel, and its characteristics are carbon containing 0.09%-0.12%, Cr, Mo element total content approximately 10%, nitrogenous 0.030%-0.060%, when making refining because alloy content is higher the heating-up time long, must cause molten steel to increase C serious.Current smelting process is a kind of is the VOD method, and another kind is the AOD method.But the shortcoming of these two kinds of processing methodes is that tap to tap time is long, refining time more than 3 hours, technological process is loaded down with trivial details, reduction process, the cost of the oxide compound of Cr are also higher in addition after the VOD/AOD process is completed, and the loss of small part alloy is also arranged in the time of the carbon oxidation.
Summary of the invention
Purpose of the present invention provides a kind of Martensite Stainless Steel smelting technology, and prior art tap to tap time is long, technological process is loaded down with trivial details to solve, and cost is also higher, and the problems such as small part alloy loss are also arranged when the carbon oxidation in the VOD process.
The technical solution adopted for the present invention to solve the technical problems is that this technique is that non-VOD smelts, reduced the process that restores of VOD or AOD process and unstable oxide afterwards, and need to continue slag making and slough oxidation products, make ladle for a long time under the condition of high temperature, accelerated the erosion loss of ladle; Reduced the content of C and P on the ultimate constituent; Its feed composition mass percent is as follows:
C:0.09%-0.12%, Cr:8%-9.5%, Mo:0.85%-1.05%, N:0.030%-0.060%, P≤0.02%, surplus are Fe.The smelting technology step is as follows:
A:EAF slightly refines: raw material is by the slightly refining in EAF of the mixed molten steel of said ratio; EAF slightly makes steel water, for guaranteeing that C content does not exceed standard, P content is enough low, P when EAF must guarantee to tap≤0.003%, C≤0.02%, can carry out the secondary slag making at 1550-1600 ℃, the tapping process of EAF adds pre-melted slag to stablize LF electric arc, and tapping temperature is brought up to 1660 ℃-1700 ℃, the tapping process of EAF adds pre-melted slag to stablize LF electric arc, is beneficial to the LF refining and melts fast alloy and intensification.400 ℃-500 ℃ of little carbon alloys of the front baking of electrosmelting aequum, and be incubated 3-5 hour, the chromium nitride alloy is at 800-900 ℃, and soaking time can guarantee that the alloy internal and external temperature evenly gets final product;
The B:LF refining: the molten steel after thick refining drops in ladle after having cleaned out and carries out the LF refining, use high-power intensification during the LF refining, the weak stirring of argon bottom-blowing or nitrogen in case electrode acutely beat and cause and increase very soon C.To add during thermalloy adds ladle successively in time more than 1620 ℃, ensure enough solution times, normal slag making deoxidation, full power feeding temperature-raising;
The C:VD refining: carrying out at last the VD refining can tap;
D: add chromium nitride: add chromium nitride about the recovery rate 40%-50% by nitrogen after the VD refining is complete;
E: come out of the stove: for stablizing the recovery rate of nitrogen element, the ladle bottom gas permeable brick changes logical bottom blowing high pure nitrogen, stirs 10-15 minute to being evenly the sampling tapping.
Adopt positively effect of the present invention to be: to shorten tap to tap time, guaranteed the content of C and P, avoided Cr and oxidation again carbon.
Embodiment
This technique is that non-VOD smelts, and has reduced the process that restores of VOD or AOD process and unstable oxide afterwards, and needs the continuation slag making slough oxidation products, makes ladle for a long time under the condition of high temperature, has accelerated the erosion loss of ladle; Reduced the content of C and P on the ultimate constituent; The concrete feed composition per-cent of Martensite Stainless Steel is as follows:
C：0.1%，Cr：9.3%、Mo：1%，N：0.040%,P：0.01%，Fe89.5%。
The processing step that Martensite Stainless Steel is smelted is as follows:
A:EAF slightly refines: raw material is by the slightly refining in EAF of the mixed molten steel of said ratio; EAF slightly makes steel water, for guaranteeing that C content does not exceed standard, P content is enough low, P when EAF must guarantee to tap≤0.003%, C≤0.02%, can carry out the secondary slag making at 1570 ℃, the tapping process of EAF adds pre-melted slag to stablize LF electric arc, and tapping temperature is brought up to 1700 ℃, the tapping process of EAF adds pre-melted slag to stablize LF electric arc, is beneficial to the LF refining and melts fast alloy and intensification.420 ℃ of little carbon alloys of the front baking of electrosmelting aequum, and be incubated 3-5 hour, the chromium nitride alloy is at 830 ℃, and soaking time can guarantee that the alloy internal and external temperature evenly gets final product;
The B:LF refining: the molten steel after thick refining drops in ladle after having cleaned out and carries out the LF refining, use high-power intensification during the LF refining, the weak stirring of argon bottom-blowing or nitrogen in case electrode acutely beat and cause and increase very soon C.To add during thermalloy adds ladle successively in time more than 1620 ℃, ensure enough solution times, normal slag making deoxidation, full power feeding temperature-raising;
The C:VD refining: carrying out at last the VD refining can tap;
D: add chromium nitride: add chromium nitride after the VD refining is complete during by the recovery rate 40% of nitrogen;
E: come out of the stove: for stablizing the recovery rate of nitrogen element, the ladle bottom gas permeable brick changes logical bottom blowing high pure nitrogen, stirs 15 minutes to being evenly the sampling tapping.
Claims (1)
1. Martensite Stainless Steel smelting technology, it is characterized in that this technique is that non-VOD smelts, reduced the process that restores of VOD or AOD process and unstable oxide afterwards, slough oxidation products by continuing slag making, make ladle for a long time under the condition of high temperature, accelerated the erosion loss of ladle; Reduced the content of C and P on the ultimate constituent; Its feed composition percentage composition is as follows:
C:0.09%-0.12%, Cr:8%-9.5%, Mo:0.85%-1.05%, N:0.030%-0.060%, P≤0.02%, surplus are Fe; The smelting technology step is as follows:
A:EAF slightly refines: raw material is by the slightly refining in EAF of the mixed molten steel of said ratio; EAF slightly makes steel water, for guaranteeing that C content does not exceed standard, P content is enough low, P when EAF must guarantee to tap≤0.003%, C≤0.02%, can carry out the secondary slag making at 1550-1600 ℃, the tapping process of EAF adds pre-melted slag to stablize LF electric arc, and tapping temperature is brought up to 1660 ℃-1700 ℃, the tapping process of EAF adds pre-melted slag to stablize LF electric arc, is beneficial to the LF refining and melts fast alloy and intensification; 400 ℃-500 ℃ of little carbon alloys of the front baking of electrosmelting aequum, and be incubated 3-5 hour, the chromium nitride alloy is at 800-900 ℃, and soaking time can guarantee that the alloy internal and external temperature evenly gets final product;
The B:LF refining: the molten steel after thick refining drops in ladle after having cleaned out and carries out the LF refining, use high-power intensification during the LF refining, the weak stirring of argon bottom-blowing or nitrogen in case electrode acutely beat and cause and increase very soon C; To add during thermalloy adds ladle successively in time more than 1620 ℃, ensure enough solution times, normal slag making deoxidation, full power feeding temperature-raising;
The C:VD refining: carrying out at last the VD refining can tap;
D: add chromium nitride: add chromium nitride after the VD refining is complete during by the recovery rate 40%-50% of nitrogen;
E: come out of the stove: for stablizing the recovery rate of nitrogen element, the ladle bottom gas permeable brick changes logical bottom blowing high pure nitrogen, stirs 10-15 minute to being evenly the sampling tapping.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210518694.9A CN103114244B (en) | 2012-12-06 | 2012-12-06 | Martensite stainless steel smelting process |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210518694.9A CN103114244B (en) | 2012-12-06 | 2012-12-06 | Martensite stainless steel smelting process |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103114244A true CN103114244A (en) | 2013-05-22 |
| CN103114244B CN103114244B (en) | 2014-09-10 |
Family
ID=48412661
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201210518694.9A Active CN103114244B (en) | 2012-12-06 | 2012-12-06 | Martensite stainless steel smelting process |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN103114244B (en) |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103667926A (en) * | 2013-12-04 | 2014-03-26 | 蚌埠华泰特种钢有限公司 | Melting method of martensitic stainless steel |
| CN105648357A (en) * | 2016-01-28 | 2016-06-08 | 中原特钢股份有限公司 | Smelting method of martensitic stainless steel for low-temperature impact |
| CN105734417A (en) * | 2016-03-04 | 2016-07-06 | 莒州集团有限公司 | Wear-resisting plate for crushing machine and manufacturing method for wear-resisting plate for crushing machine |
| CN107385144A (en) * | 2017-05-25 | 2017-11-24 | 中原特钢股份有限公司 | The 4PH smelting processes of precipitation hardening of martensitic stainless steel 17 |
| CN109457169A (en) * | 2018-12-25 | 2019-03-12 | 烟台台海玛努尔核电设备有限公司 | A kind of smelting process of P91 steel |
| CN112063912A (en) * | 2020-09-22 | 2020-12-11 | 攀钢集团攀枝花钢铁研究院有限公司 | Nitrogen alloying method of martensitic stainless steel for plastic mould |
| CN115948695A (en) * | 2022-11-25 | 2023-04-11 | 烟台华新不锈钢有限公司 | High-chromium martensitic stainless steel and production and manufacturing method thereof |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5864310A (en) * | 1981-10-13 | 1983-04-16 | Kawasaki Steel Corp | Production of stainless steel |
| CN102206735A (en) * | 2011-04-19 | 2011-10-05 | 胡锦耀 | Production method of stainless steel motor shaft |
| CN102787206A (en) * | 2012-08-06 | 2012-11-21 | 攀钢集团江油长城特殊钢有限公司 | Smelting method for controlling nitrogen content in steel ingot of medium carbon chromous mold steel and steel ingot |
-
2012
- 2012-12-06 CN CN201210518694.9A patent/CN103114244B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5864310A (en) * | 1981-10-13 | 1983-04-16 | Kawasaki Steel Corp | Production of stainless steel |
| CN102206735A (en) * | 2011-04-19 | 2011-10-05 | 胡锦耀 | Production method of stainless steel motor shaft |
| CN102787206A (en) * | 2012-08-06 | 2012-11-21 | 攀钢集团江油长城特殊钢有限公司 | Smelting method for controlling nitrogen content in steel ingot of medium carbon chromous mold steel and steel ingot |
Non-Patent Citations (1)
| Title |
|---|
| （奥）R.基费尔，（美）P.施华尔茨柯普弗: "《硬质合金》", 30 September 1963 * |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103667926A (en) * | 2013-12-04 | 2014-03-26 | 蚌埠华泰特种钢有限公司 | Melting method of martensitic stainless steel |
| CN105648357A (en) * | 2016-01-28 | 2016-06-08 | 中原特钢股份有限公司 | Smelting method of martensitic stainless steel for low-temperature impact |
| CN105734417A (en) * | 2016-03-04 | 2016-07-06 | 莒州集团有限公司 | Wear-resisting plate for crushing machine and manufacturing method for wear-resisting plate for crushing machine |
| CN107385144A (en) * | 2017-05-25 | 2017-11-24 | 中原特钢股份有限公司 | The 4PH smelting processes of precipitation hardening of martensitic stainless steel 17 |
| CN107385144B (en) * | 2017-05-25 | 2019-03-22 | 河南中原特钢装备制造有限公司 | Precipitation hardening of martensitic stainless steel 17-4PH smelting process |
| CN109457169A (en) * | 2018-12-25 | 2019-03-12 | 烟台台海玛努尔核电设备有限公司 | A kind of smelting process of P91 steel |
| CN112063912A (en) * | 2020-09-22 | 2020-12-11 | 攀钢集团攀枝花钢铁研究院有限公司 | Nitrogen alloying method of martensitic stainless steel for plastic mould |
| CN115948695A (en) * | 2022-11-25 | 2023-04-11 | 烟台华新不锈钢有限公司 | High-chromium martensitic stainless steel and production and manufacturing method thereof |
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| Publication number | Publication date |
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| CN103114244B (en) | 2014-09-10 |
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